Mixing Primary and Secondary Color Paddles are used for experiments involving additive and subtractive color, color mixing, color transmission, absorption and filtering of the different wavelengths of light.

Diffraction Gratings are used for the direct viewing and analysis of spectra from different light sources. Experiment with both the 13,500 line/inch and the 500 Line/mm. The diffraction gratings are the principal component in a spectroscope and can be used for many of the same experiments. View the spectra from different gas tubes.